Stink bugs can be difficult to kill in soybeans, especially if brown stink bug is present. Pyrethroids are generally active on green stink bug, with some effect on brown stink bug. Included in this trial, Cobalt Advance, Justice, Brigade, Besiege and DoubleTake, all contain pyrethroids. Note that a majority of the population was green stink bug. Neem is a certified organic material.
We have a new sweep net threshold for stink bugs in soybeans, based on some very recent work with Virginia Tech. This is 5 stink bugs in 15 sweeps. Note that levels in the untreated plots were above this threshold.
Dominic Reisig, North Carolina State University Extension Entomologist